Hybrid lamellar silica: combined template extraction and hydrophilic silanation.
The surface modification of lamellar silica prepared by liquid crystal templating has been investigated. Two hydrophilic surface modifier agents, 2-glycidoxypropyltrimethoxysilane and 2-[methoxy(polyethyleneoxy)propyl)]trimethoxysilane, have been tested. Characterizations of the modified silica include thermal analysis, (13)C and (29)Si solid state NMR, transmission electron microscopy (TEM) and X-ray diffraction (XRD). The different characterizations confirmed the preservation of the lamellar morphology and the successful surface modification with both silanes along with the template elimination. The results also indicate that the structure and length of the silanes influence the final lamellar organization as well as the grafting yields and mechanisms.
Toussaint
Gilles
G
CMI, Institute of Chemistry B6a, University of Liege, Sart Tilman, B-4000 Liege, Belgium. Gilles.Toussaint@ulg.ac.be
Brisbois
Magali
M
Grandjean
Jean
J
Cloots
Rudi
R
Henrist
Catherine
C